Tenkyuu no Harmonia

In 18th-century Paris, "A woman's fortune is made by marrying a good man."
But Sophie, the daughter of a fabric store owner, spends her days thinking about mathematics instead, even in her sleep.
At first, her family didn't understand her dream, but her "obsession" was infectious, and before she knew it, everyone was supporting her pursuit!

(Source: good! Afternoon, translated)